I’m kind of a kibitzer in Arrow - I help with the project governance, and may have helpful comments occasionally, but I don’t implement features, and use Arrow only rarely.
So I don’t think the OGC should respond to my comments specifically. I suggest that you monitor that Arrow thread, see whether consensus and an individual who is a thought leader emerges, and respond if and when that happens. Also, people chiming in and nudging the discussion in the right direction, as some have already done, is most welcome. Julian > On Jun 29, 2021, at 8:35 AM, George Percivall <[email protected]> wrote: > > Josh, > > Thanks for inviting the Apache Projects to participate in OGC activities. > > To get things jump started, could you get an OGC response to Julian’s > comments? > >> I think allowing WKB and WKT is sufficient. >> >> Perhaps Geometry could be a composite type (WKT, SRID) or (WKB, SRID). SRID >> (spatial reference identifier) is almost always needed to qualify a geometry >> value. It is analogous to how TimeZone is needed (implicitly or explicitly) >> to qualify a DateTime value. >> >> For Geospatial queries to perform well requires some kind of indexing >> (and/or clever data organization). Geospatial indexing is very complex, and >> there is no “one size fits all” approach. So I recommend that Arrow stays >> out of the indexing business, and leaves indexing to the engine. > > > George Percivall > GeoRoundtable > [email protected] > > > > >> On Jun 28, 2021, at 4:18 PM, Joshua Lieberman <[email protected]> >> wrote: >> >> Hi, >> >> This is Josh Lieberman, on the staff of the OGC. I’ve been interested for a >> while in helping to standardize geospatial data types for various python >> packages and other mainstream computing tools. The goal is to help base >> these on common, valid geospatial models in order to make data sharing >> across tools and platforms more reliable. Another goal is to help avoid >> reinventing wheels. For example, PostGIS supports EWKT and EWKB which >> already include SRID’s. >> >> We (OGC) are specifically interested in working with our partners, such as >> Apache, to host an “Encoding Summit” at our September or December Member >> Meeting. A principle focus will be JSON encodings, but data type encodings >> for other environments are also of interest. One outcome could be an >> Encodings working group that targets “round trip” interoperability between >> various encodings. Another could simply be joint work items to further these >> objectives. >> >> Let me know if you might be interested in participating. >> >> Thanks, >> >> Josh >> >> >>> On Jun 28, 2021, at 12:49 PM, Martin Desruisseaux >>> <[email protected]> wrote: >>> >>>> Le 28/06/2021 à 18:07, Jim Hughes a écrit : >>>> Would the [email protected] mailing list be a good place to discuss >>>> things? >>> >>> Sure please do. I'm not familiar with the arrow project but I could try to >>> participate on the use of international standards (OGC and ISO) on the >>> following topics: >>> >>> * SRID (or more generally Coordinate Reference Systems) >>> * WKB or WKT for geometries >>> * Queries using standard spatial filters (defined by OGC) >>> >>> Martin >>> >>> >> >
